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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.photoeditor.actions;
import android.content.Context;
import android.util.AttributeSet;
import com.android.gallery3d.photoeditor.PhotoView;
import com.android.gallery3d.photoeditor.filters.RotateFilter;
/**
* An action handling rotate effect.
*/
public class RotateAction extends EffectAction {
private static final float DEFAULT_ANGLE = 0.0f;
private static final float DEFAULT_ROTATE_SPAN = 360.0f;
public RotateAction(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public void prepare() {
// Disable outputting rotated results and directly rotate photo-view for animations.
final RotateFilter filter = new RotateFilter();
disableFilterOutput();
final RotateView rotateView = factory.createRotateView();
rotateView.setOnRotateChangeListener(new RotateView.OnRotateChangeListener() {
float rotateDegrees;
Runnable queuedTransform;
PhotoView photoView = factory.getPhotoView();
@Override
public void onAngleChanged(float degrees, boolean fromUser) {
if (fromUser) {
rotateDegrees = degrees;
transformPhotoView(rotateDegrees);
notifyChanged(filter);
}
}
@Override
public void onStartTrackingTouch() {
// no-op
}
@Override
public void onStopTrackingTouch() {
// Round rotate degrees to multiples of 90 degrees.
if (rotateDegrees % 90 != 0) {
rotateDegrees = Math.round(rotateDegrees / 90) * 90;
}
transformPhotoView(rotateDegrees);
rotateView.setRotatedAngle(rotateDegrees);
filter.setAngle(rotateDegrees);
notifyChanged(filter);
}
private void transformPhotoView(final float degrees) {
// Remove the outdated rotation change before queuing a new one.
if (queuedTransform != null) {
photoView.remove(queuedTransform);
}
queuedTransform = new Runnable() {
@Override
public void run() {
photoView.rotatePhoto(degrees);
}
};
photoView.queue(queuedTransform);
}
});
rotateView.setRotatedAngle(DEFAULT_ANGLE);
rotateView.setRotateSpan(DEFAULT_ROTATE_SPAN);
}
}
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